My mom has Alzheimer for the last 6 years now. My father is at home and taking care of her and her needs. I visit and do my best to provide her with other necessities. I take her for medical check up every 4 months. She's on cholesterol and Alzheimer medication. Most of the times it such a hard task for my dad to give her meds. I really feel sorry for my dad who finds it so difficult to give her meds daily. At times I see my dad very sad as he sees my mother deteriorating day by day. It's hard for as well to see my mother like these as she was such a brave , vibrant and full of love and independence. She has lost a lot weight and looks like a 90 year old person . She's only 66. Is this normal ?